Description of how each construct of the HAPA was covered in the questionnaire
| HAPA construct | n questions | Coaches | Presentation |
| Motivational phase | |||
| Injury risk perceptions | 2 | All | IPEP users vs non-users |
| Outcome expectancies | 2 | All | IPEP users vs non-users |
| Action self-efficacy | 2 | All (one question) KC+users (one question) | IPEP users vs non-users Descriptive |
| Intention to maintain use of Knee Control+ | 1 | KC+users | Descriptive |
| Goal-pursuit phase | |||
| Action planning | 1 | KC+users | Descriptive |
| Maintenance self-efficacy | 1 | KC+users | Descriptive |
| Coping planning | 1 | KC+users | Descriptive |
| Recovery self-efficacy | 1 | KC+users | Descriptive |
All questions were rated on a 1–7 Likert scale. ‘IPEP users’ include coaches who used Knee Control, Knee Control+ or the 11+.
HAPA, Health Action Process Approach; IPEP, injury prevention exercise programme; KC+, Knee Control+.